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<a href="twi__master_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001  <span class="comment">/* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * The information contained herein is confidential property of Nordic</span>
<a name="l00004"></a>00004 <span class="comment"> * Semiconductor ASA.Terms and conditions of usage are described in detail</span>
<a name="l00005"></a>00005 <span class="comment"> * in NORDIC SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment"> * WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment"> * the file.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> */</span>
<a name="l00012"></a>00012 
<a name="l00013"></a>00013 <span class="preprocessor">#ifndef TWI_MASTER_H</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define TWI_MASTER_H</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00016"></a>00016 <span class="comment">/*lint ++flb &quot;Enter library region&quot; */</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="preprocessor">#include &lt;stdbool.h&gt;</span>
<a name="l00019"></a>00019 <span class="preprocessor">#include &lt;stdint.h&gt;</span>
<a name="l00020"></a>00020 
<a name="l00038"></a><a class="code" href="group__lib__driver__twi__master.html#ga67c0f91739433360f513b097acf11946">00038</a> <span class="preprocessor">#define TWI_READ_BIT                 (0x01)        //!&lt; If this bit is set in the address field, transfer direction is from slave to master.</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a><a class="code" href="group__lib__driver__twi__master.html#ga13a824cf1c6a37f2ddea21c962128a3e">00040</a> <span class="preprocessor">#define TWI_ISSUE_STOP               ((bool)true)  //!&lt; Parameter for @ref twi_master_transfer</span>
<a name="l00041"></a><a class="code" href="group__lib__driver__twi__master.html#gaedaa985feb5cea808d8811bd7ceeb318">00041</a> <span class="preprocessor"></span><span class="preprocessor">#define TWI_DONT_ISSUE_STOP          ((bool)false) //!&lt; Parameter for @ref twi_master_transfer</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>
<a name="l00043"></a>00043 <span class="comment">/* These macros are needed to see if the slave is stuck and we as master send dummy clock cycles to end its wait */</span>
<a name="l00044"></a>00044 <span class="comment">/*lint -e717 -save &quot;Suppress do {} while (0) for these macros&quot; */</span>
<a name="l00045"></a>00045 <span class="comment">/*lint ++flb &quot;Enter library region&quot; */</span>
<a name="l00046"></a><a class="code" href="group__lib__driver__twi__master.html#ga7635564961ef4b40ebe54c566b25dc75">00046</a> <span class="preprocessor">#define TWI_SCL_HIGH()   do { NRF_GPIO-&gt;OUTSET = (1UL &lt;&lt; TWI_MASTER_CONFIG_CLOCK_PIN_NUMBER); } while(0)   </span>
<a name="l00047"></a><a class="code" href="group__lib__driver__twi__master.html#gafef260a0ebd7d5669cd2731d2c20f55d">00047</a> <span class="preprocessor">#define TWI_SCL_LOW()    do { NRF_GPIO-&gt;OUTCLR = (1UL &lt;&lt; TWI_MASTER_CONFIG_CLOCK_PIN_NUMBER); } while(0)   </span>
<a name="l00048"></a><a class="code" href="group__lib__driver__twi__master.html#ga112251118224f5623c20423efce89ae8">00048</a> <span class="preprocessor">#define TWI_SDA_HIGH()   do { NRF_GPIO-&gt;OUTSET = (1UL &lt;&lt; TWI_MASTER_CONFIG_DATA_PIN_NUMBER);  } while(0)   </span>
<a name="l00049"></a><a class="code" href="group__lib__driver__twi__master.html#ga6b884c7770898bf063884f3f1893d492">00049</a> <span class="preprocessor">#define TWI_SDA_LOW()    do { NRF_GPIO-&gt;OUTCLR = (1UL &lt;&lt; TWI_MASTER_CONFIG_DATA_PIN_NUMBER);  } while(0)   </span>
<a name="l00050"></a><a class="code" href="group__lib__driver__twi__master.html#ga63ae25f476902e9df0c31b057e2bb527">00050</a> <span class="preprocessor">#define TWI_SDA_INPUT()  do { NRF_GPIO-&gt;DIRCLR = (1UL &lt;&lt; TWI_MASTER_CONFIG_DATA_PIN_NUMBER);  } while(0)   </span>
<a name="l00051"></a><a class="code" href="group__lib__driver__twi__master.html#gaa6c311f207bff59456fb22648965c53b">00051</a> <span class="preprocessor">#define TWI_SDA_OUTPUT() do { NRF_GPIO-&gt;DIRSET = (1UL &lt;&lt; TWI_MASTER_CONFIG_DATA_PIN_NUMBER);  } while(0)   </span>
<a name="l00052"></a><a class="code" href="group__lib__driver__twi__master.html#gaa73e62b201f371e4d2e543f0ba2bb4cb">00052</a> <span class="preprocessor">#define TWI_SCL_OUTPUT() do { NRF_GPIO-&gt;DIRSET = (1UL &lt;&lt; TWI_MASTER_CONFIG_CLOCK_PIN_NUMBER); } while(0)   </span>
<a name="l00053"></a>00053 <span class="preprocessor"></span><span class="comment">/*lint -restore */</span>
<a name="l00054"></a>00054 
<a name="l00055"></a><a class="code" href="group__lib__driver__twi__master.html#ga0a7e559c3bceb5b50ff3e51cabb21f73">00055</a> <span class="preprocessor">#define TWI_SDA_READ() ((NRF_GPIO-&gt;IN &gt;&gt; TWI_MASTER_CONFIG_DATA_PIN_NUMBER) &amp; 0x1UL)                     </span>
<a name="l00056"></a><a class="code" href="group__lib__driver__twi__master.html#ga45cf9fc8c9487711c3b8457b8e1116b2">00056</a> <span class="preprocessor">#define TWI_SCL_READ() ((NRF_GPIO-&gt;IN &gt;&gt; TWI_MASTER_CONFIG_CLOCK_PIN_NUMBER) &amp; 0x1UL)                    </span>
<a name="l00058"></a><a class="code" href="group__lib__driver__twi__master.html#ga0bdffa7178084c5e1b2e11d3a95c5e85">00058</a> <span class="preprocessor">#define TWI_DELAY() nrf_delay_us(4) </span>
<a name="l00070"></a>00070 <span class="preprocessor">bool twi_master_init(void);</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span>
<a name="l00092"></a>00092 <span class="keywordtype">bool</span> <a class="code" href="group__lib__driver__twi__master.html#ga36e8039d4cbb4f66c0cf0cf1e3a72445">twi_master_transfer</a>(uint8_t address, uint8_t *data, uint8_t data_length, <span class="keywordtype">bool</span> issue_stop_condition);
<a name="l00093"></a>00093 
<a name="l00098"></a>00098 <span class="comment">/*lint --flb &quot;Leave library region&quot; */</span>
<a name="l00099"></a>00099 <span class="preprocessor">#endif</span>
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